On the show where yall tried to see if there is something you can do to fool the breathalizer machine,, well there is a way,, dont know if you want everyone to know what it is,, but it worked for me once,,, it wont show u sober ,, but it wont show anything at all,, little did i know that they cant make you take it 2 and 3 times,, but chew a cigerette in the ride to cop shop,, and swallow,, I proved it would work,,

thanks,, cajunsweety

As to your test, a single phone may or may not cause interference as you saw, but multiple phones operating at different frequencies (800, 900, 1800 & 1900MHz.) can mix with each other to create other frequencies and which can also increase the probablility of causing issues with aviation instrumentation.

One other item, most of the planes manufactured in the last 10 years are now using wirless transponders and not wiring harnesses to communicate with the planes sensors. This is even more of an issue especially when planes travel into areas not natiative to where the plane was designed or manufactured as different countries have different frequency allocations.

The FAA and FCC are doing the right thing by restricting the use on board aircraft.

A note about terminology. You say, "at 800-900MHz (a common cellphone bandwidth)...." You should say "frequency". Those numbers mean that the waves coming out of the radio oscillate 800 million to 900 million times per second. Bandwidth is something completely different. Somehow a word, bandwidth, which was never spoken by anyone except electrical engineers, started being used by the public. It reminds me of how so many people use the word "schizophrenic" thinking that it means "multiple personality disorder". I don't know how that happened, since it doesn't mean that at all.